【作者】 刘慧；

【导师】 刘瑞泉；

【作者基本信息】 新疆大学 ， 化学， 2013， 硕士

【摘要】 随着科技的发展，我国的工业也迅速发展起来，工厂给环境带来的污染也是越来越严重，而随着生活质量的提高，人们对环境质量的要求却是越来越高，因此，能够检测污染环境和危害人体健康的气体的传感器引起了人们的更多的关注，研究制备具有良好性能的气体传感器有着重要的意义。本文以聚苯胺和BaCe_0.9M_0.1O_3-δ（M=Sm, Eu, Gd, Tb, Dy）为原料，用直接分散法制备聚苯胺/BaCe_0.9M_0.1O_3-δ（M=Sm, Eu, Gd, Tb, Dy）复合粉体。其中，BaCe_0.9M_0.1O_3-δ（M=Sm, Eu, Gd, Tb, Dy）粉体采用溶胶凝胶法制备，聚苯胺采用化学氧化法制备。通过XRD得到了BaCe_0.9M_0.1O_3-δ的结构信息，通过FT-IR吸收光谱得到了聚苯胺的特征吸收峰，通过TEM得到了有机/无机复合材料的形貌。用电压检测的方法测试了单一材料与有机/无机的复合材料的气敏性能。通过测试可知：聚苯胺/BaCe_0.9M_0.1O_3-δ（M=Sm, Eu, Gd, Tb, Dy）复合材料气体传感器在室温下就对氨气有一定的响应，并且对乙酸乙酯，氢气，乙醇，丙酮，苯和甲烷几乎没有响应，对氨气有着很好的选择性。单一的有机材料或者无机材料对氨气的灵敏度没有复合材料对氨气的灵敏度高。有机材料在室温下的氨敏性较低，无机材料的工作温度较高，而复合材料的在室温下即有较好的氨敏性，并且选择性好，性能稳定，是一种低能耗、灵敏度高的气敏材料。综上所述，通过有机材料与无机材料的复合，我们得到了性能良好的新型的复合材料气体传感器，具有一定的应用前景，并且初步探讨有机/无机复合材料的气敏机理。更多还原

【Abstract】 With the development of science and technology, the industry of our countrydevelops rapidly, which brings to the environment more more serious pollution, whilewith the improvement of life quality, people require more on environmental quality,so the gas sensors for the detection of gas bad to the environment and human healthare especially attracted people’s attention. It is very important to research the gassensor which has good properties.In this paper, the PANI/BaCe_0.9M_0.1O_3-δ（M=Sm, Eu, Gd, Tb, Dy）compositematerials were prepared with the powder of PANI and BaCe_0.9M_0.1O_3-δ（M=Sm, Eu,Gd, Tb, Dy） by direct dispersion method. BaCe_0.9M_0.1O_3-δ（M=Sm, Eu, Gd, Tb, Dy）powders prepared by sol-gel method and polyaniline prepared by chemical oxidation.The structural information of BaCe_0.9M_0.1O_3-δwere analyzed by XRD. Thecharacteristic absorption peaks of polyaniline were analyzed by FT-IR. The micromorphology of composite materials were obtained by TEM. The gas sensingproperties of composite materials and single material were tested by the method ofvoltage detection.The test shows: BaCe_0.9M_0.1O_3-δ（M=Sm, Eu, Gd, Tb, Dy） composite gas sensorcan present good gas sensing properties to ammonia gas under the conditions ofroom temperature, and present high selectivity to ammonia compared to ethyl acetate,hydrogen, ethanol, acetone, benzene and methane. It was found that ammoniasensitivity of single organic material in room temperature is low and inorganicmaterial working temperature is high, however, composites materials posesses betterammonia sensitivity at room temperature, and exhibits good selectivity and stability.PANI/BaCe_0.9M_0.1O_3-δ（M=Sm, Eu, Gd, Tb, Dy） composites is a kind of low energyconsumption, high sensitivity of the gas sensing material.Above all, the new type of composite materials gas sensors based onorganic/inorganic with good properties has a certain application prospect. The mechanism of gas sensing of organic/inorganic materials were preliminarydiscussed.更多还原